Akal Bodhon : The worship of Ma Durga in the month of Ashwin is called 'Akalbodhan'. It's an uncustomary time for commencement of the worship. Traditionally durga puja is performed during the spring (Basanta). Ram did "Chandi Puja" before his war with Ravana despite the time of year not being right. He  invoked the blessings of Durga to kill Ravana. That's why Durga Puja is also called Akal Bodhon (untimely invocation). 

Sandhi puja : (108 'Dip' lighted)  It is being performed at the end moment of Ashtami and at the beginning of Nabami. At this time Devi Durga transformed into Devi Camunda to kill "Chando" and "Mundo", the two great generals of  Mahishasura (the Buffalo Demon ).   

Different Names of Durga Puja: As it's most important festival of bengali people, the puja is also performed under different names throughout the country. In South, she is worshipped as Amvika, in Gujrat as Hingula and Rudrani, as Uma in Bihar, as Kanyakumari in Tamil Nadu, and as Amva in Kashmir.

Puja Now and Then: Earlier Durga Puja was worshipped by rich and powerful people like Rajas and Landlords. But it has changed over the years. Now puja is being held by different clubs and societies  etc. It's significance has been reduced to minor. Conch Shells and Drums became less significance and film songs and disco getting much preferences. But on positive side animal sacrifices more or less disappeared. 

Puja Timings: Puja is celebrated in the month of September / October. The religious functions of Hindu Bengalis starts in the month of Aashin with the timings of the moon's movement, better known as 'Tithhi'. The schedule of Durga Puja is also framed on the basis of the 'Tithhi'.  

Sindur Khela (Vermillion game)- It's also one of the events on the day of Dashami. After Ma Durga is immersed married Bengali women apply vermilion to each other and men does 'Kolakuli'.